We made the operational sky measurements for two and half years from April 2003 to September 2005, using the sky radiometer and presented the analized results of the aerosol optical properties over Kanazawa area, Japan, namely, the optical thickness τa (500) at the wavelength of 0.5μm and &angst;ngstroem exponent α. The reflectance ratios between the visible and short wave infrared bands were computed for typical ground covers, such as the vegetation, urban, and others (soil and sand), using several image data sets of Terra/MODIS and these sky observation data sets.